Small site plus simple CMS and gallery

The 2nd of december (thursday) I will have to show a client a model of a site where they have to be able to change some texts and images with a simple opensource CMS. The basis of this site can be found at: [url removed, login to view]

I'd like to use a simple open source CMS to control the text and images:

[url removed, login to view]

[url removed, login to view];type=admin

[url removed, login to view]

In case the WYSIWYG editor does not support special characters, I'd like to use: [url removed, login to view]

Most important is that the editor performs well and is capable of handling special characters.

The site also has to contain a fotogallery where the client has to be able to upload images and add corresponding text via the admintool. On the frontend, a field of thumbnails (e.g. ) has to be shown and when clicked upon, a bigger image will show with additional information. Also entryfields have to be shown to search for an artist or technique. This search results in a categorized list of thumbnails plus. Clicking on of the thumbnails results in a popup window with additional information about the work of art and the artist.